When a guy asks to hang out, just the both of you, does that automatically mean its a date? Or that he's interested in a romantic way?

I met a guy a few days ago(we just talked on the bus), he added me on Facebook the next day and two days after he said: "I'd like to hang out with you sometime soon:)" he suggested we go check out a new store and after go grab some lunch. I accepted his offer because I wasn't busy and I didn't mind hanging out but when I told my friends they told me that that would be a date. I never considered it anything close to romantic. Was it bad that I said yes? I dont't want to lead him on either because I'm interested in someone else but I really looked at our hang out as a platonic thing.